Tracopower thd 15 series 15w dc dc converters tracopower thd 15 4812 the thd 15 series from tracopower offers high performance 15w dc dc converters in an encapsulated 254 x 254 x 10mm package occupying 50 less pcb space than similar converters they have a wide 21 input range and precisely regulated isolated output voltages tracopower thd 15 4812 15w dc dc converter 36 75v dc in 12v dc 125a out